您可以通过将根数据传递给调用来做到这一点

You can do like this by passing in the root data to the invoke

connection.invoke('Send', "rk", "wassup", Root);

然后在中心中为根数据添加另一个参数

Then in your hub add another params for the root data

public async Task Send (string user , string message, string root)
{
  await Clients.All.SendAsync("Send", user, message);
}

由于您提交了json字符串，因此可以更新

Update since you are submit json string you can use

JsonConvert.DeserializeObject<List<object>>(root);